Hamline q



Patented Feb. 6', 1883..

iYIIII/IIIIIIIIIII DOUBLE ACTING PUMP.

Fig.1.

HiQpFRfiNGH & G. G. SHENTON.

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HAMLINE Q. FRENCH, or PELHAM MANon, AND GEORGE e. snnutron, on BROOKLYhL-N. Y.; sAID SHENTON ASSIGNOR TO sAID FRENCH.

DOUBLE-ACTING PUMP.

SPECIFICATION forming part of Letters Patent No. 271,829, dated February 6, 1883.

Application filed April 21. 1882. (No model.)

TON, a citizen of the United States, residing at.

Brooklyn, in the county of Kings and State of New York, haveinvented new and useful Improvements in Double-Acting Pumps, of which the following is a specification,

Thisiinventionrelatestodouhle-acting pumps comprising twonpright cylinders and an airehamber at the top of the cylinders, having the latter connected thereto; and it consists in the 1 novel construction and arrangement of parts,

hereinafter described, whereby the manufacture of the pumps is simplified or cheapened and a' facile and safe arrangement of reacting springs is obtained. 2 This invention is illustrated in the accompanyiug drawings,in which Figure'l represents a sectional elevation. Fig. 2 is a horizontal section through the pump-cylinders, looking upward. Fig. 3 is a vertical section on the line wx,Fig.1. FigAisadetailviewotthefulcrum for the plunger-operating beam, I

Similar letters indicate corresponding parts. The letter A designates a base, from which rise the pump-cylinders B, twoin number, and 0 in which is arranged a suction-pipe, 0, connecting with both cylinders. D indicates the air-chamber. Each of the cylinders B is composed of a seamless drawn tube, so that w hen it has been cut to the required length it is 3'5 ready for use and requires no further linish, and for the purpose of connecting the cylinder to the air-chamber D we employ a crown-plate, E, which is common to both cylinders, and which is secured, as by screws, to a flange, F,

A 40 cast or otherwise attached-to the lower edge Prior to our invention it has been common to cast the cylinders B, and hence it is necessary to finish or true the same, which obviivalves, while the valve-pins at the same time ously requires considerable labor and skill, whereas by making the cylinders of seamless tubes and using a single connecting or crown plate for both cylinders the labor involved in the manufacture of the pump is reduced to a minimum, and the cost thereofis comparatively reduced.

From the air-chamber D extends a delivery- .pipe, F, containing the usual dischargewalve, G, which opens upward. In the old style of pumps no provision is made for opening this valve Gr other than by the ascending column of water, and, a quantity of the water always remaining in the connections of the deliverypipe, this water is liable to freeze in cold weather. For the purpose of opening the discharge-valve G and retaining the same in' an open position, we make use of a cam, H, which is arranged in the delivery-pipe in such a manner that when it is set to the proper position it acts on the valve to raise the same off from its seat, as indicatedin Fig. 1. This cam H is fixed to a shaft, I, which has its bearings in thesides of the delivery-pipe, and one end of which projects outward therefrom through a stufling'box, and is provided with a finger-button, K.

The pump-plungers L, working in the cylinders B, carry the usual valves, N, and at the lower ends of the cylinders B are arranged the usual suction-valves, (),provided with center pins, c, and heels a, so that when the plungers are lowered to the fullest extent they strike the valve-heels, and thereby open the suctionv 5 open the plunger-valves, indicated on the right-hand side of Fig. 1, whereby the water that may be contained in a pump-cylinder is allowed to discharge. When the extra power applied to bring the plungers L to the extreme positions last referred to is left or taken off, the plungers are brought back to their normal positions by means of reacting springs P-one to each plunger-which are made in the form of spirals, and are coiled on the plunger-rods L within the pump-cylinders, so that these springs are com pressed'by the plungers against the top of the air-chamber D, adjacent to the points where the plunger-rods pass through such top, onthe upward movement of the pluntoo which has its fulcrum on a pivot, S, and in order to reduce the wear on this pivot we make the same rigid or stationary, as in the manner shown in Fig. 4.

We are aware that an air-vessel has been arranged over and between two pump-cylinders to form the fulcrum of the pump-lever,

combined with a water-way connecting the lower ends of the cylinders, and a Water-delivery pipe extending from the casing of the airchamber, said delivery-pipe containing a checkvalve, and the pump cylinders containing valves having vertical pins and heels, so that when the plungers descend they act on the heels of said valves to lift thelatter, while the pins on the valves open valves in the plungers. Such, therefore, we do not broadly claim.

We are also aware that a cam has been arranged to lift a valve located in the pipe which delivers the water to the pump-barrel, said valve, when lifted by the cam, serving to open the valve in the pump-cylinder to permit the water to be emptied therefrom; but such is not our invention.

What we claim as new, and desire to secure by Letters Patent, is

1. The combination, substantially as herein before set forth, of the pump-cylinders composed of seamless drawn tubes, the independent crown-plate having orifices inwhich the upper ends of the cylinders are secured, and

the air-chamber constructed with aflange upon HAMLINE Q. FRENCH. L. s] GEO. sHEN'roN. pt. s]

Witnesses: I

W. HAUFF,

' CHAS. WAHLERS. 

